Method of manufacturing ring molds and the like



lll

ltlllllllll lllllll ine n i im a llvded and this application tiled July t,

` To all fte/tom t f/najf/ conocen:

" lite lill lli

lle it known that ll, lPn'rnn ,linonn/i7 a citizen ot 'the lliuited States, residing' at nth Connells'ville.)"in the county oit lFayettej @tate ot Pennsylvania hare invented `ain new and uee'lful improvements in hoc` ot lt/lanutacturine, llingv ll/lolds and the like, ot which the tolle-Wing; is a specitication-` Vlhe present invention. relates litoadly to inetal Worliiiiiig, and more particularly to u method tor manufacture and repair o l2 ring' iiwldsiadapted tor use in pnessino,y glassware and the lilte.

f lhe Principalohject et the present intention is a method comprising displacinp; metal trom the hody` ot the ring mold to term a hard, compact edge, then shaping; the `displaced metal to hringg the mold to the required size.

jtnother object ot the present invention comprisesthe method et treating1 worn ring; molds hy ailiplyingg` pressure to the mold to reshape the matrix portion oit the mold and to displace a side wall ont` the mold nherehy sutlieient metalisprovided to permit reforming ot the mold to the refuiired eine.

lt further ohjeet ot the present` intention is the method of treating); Worn glass-press# in@u mold parts hy expanding the metal at the worn portion oit the part, then re-shapiinggthe part to the desired shape and dimension`-` y Qt.. 'further and more speeitieohject oft the present invention is the method ot treatini;1 worn portions oit glass-pressing; devices hy expanding the metal adjacent the worn part to a position heyond the dimension reoiiiired, then cuttingl away the excess nietal toohtain the desired dimension.

4^ further and "u1o re speciiic object oilZ the present invention is the method oit repairing 'Worn ring molds hy dispitre/iria` the metal radially and inwardly on the inner side ett theV ring; to lessen the internal diameter ot the rino, then re-shzuuingI 'the inner diameter ol the ring to the required shape and size 1li. still tfurther and more speritic ohiect el? the present `invention is the treatment et worn ring niolds which comprises spinning the inner edite et the ring mold inwardly to contract the opening in the ring; to a diameter less than the required size, then cuttine' away the .metal until the desired diameter is obtainedu i tlther andgturther ohjects ot the present invention "will iu part he ohvious and will iin part he piiinted out hereinafter hy Yreiference to the acconuvanying;` drawings Termm inn; a part ot the present application and .rliercin lilte parts are designated hy like characters throughout the several igures thereot.

ltealiningthat the present. invention may he carriedout hy methods other than those herein disclosed l desire that the disclosure herewith shall he considered as illustrative and notin the limiting1 sense.

ligure l illustrates a hloek mold with an improved ringniold made in accordance 'with the present invention and a plunger toru'iinp; a glass tinnhler. i

Figure 2 is aneularged View et a section oit the rino mold shown in Figure 1.

Figure 3 illustrates the condition oli' a `worn ring mold with the normali shape shown in dotted lines.

lignire t illustrates a worn ringr mold atter a spinning' opei'ation has heen pei'- itorined thereon.

ldigjure `5 illustiates a mold shown in lligure 4t after the front edge thereot has heen recut hy roaming' or horing.

lligrure 6 illustrates a spinningI mechanism at the beginning; otithe operation to restore a worn ring; and

llizoguie i shows a 'front View ot one 'term oi spinnino` tool.

fl'n the niaiiuitacture ot all pressed glass Ware a plastic charge ot hot glass .is dropped into :1 hlochy nio-ld which usually in the term oit a cup `with the interior diameter `corresponding in shape to the article to he made. ft plunger is adapted to shape the interior oit the article and to torce the plastic glass into cont-act with the walls ot the hlocli incid. rlhe upper edge ot the article is usually linished hy a separate mold part known as a rin mold which is tightly held in position on the block mold when the lith plunger is driven therein to shape the glass. The shaping operation usually is performed under great pressure and the glass in attempting to escape tends to How between the plunger and the ring mold. This subjects the inner edge of the ring mold to great heat and excessive pressure so that this edge tends to wear away quickly. Vhen the edge is worn tins or burs appear on the upper edge of the tumblers being made. Obviously as soon as these fins or burs occur in any size the ware is rejected and the ring mold must be replaced. Heretofore it has been customary to throw rings away or if the factory were ina-king different sized tumblers the ring mold might be recut for a larger size. lVhere a factory is making but one size this cannot be done. Consequently the rings when worn are usually discarded thereby adding greatly to the cost of the finished ware.

The present invention overcomes the difficulties of the known art by displacing the metal adjacent the inner wall of the ring inwardly whereby the opening in the ring is contracted. rThis displacement may be accomplished in different ways, but the preferred way is that of spinning. By the spinning method the ring is mounted in a suitable chuck and is subjected to a spinning roll moved under pressure in the direction of the axis of the ring, so that the desired displacement of the metal is accomplished. After an excess of metal has been displaced, the required diameter may be obtained by spinning the metal back to the exact diameter desired, or a very slight cut may be made with a suitable lathe tool or otherwise, (for example by means of a reamer), and the ring is again ready for use.

The invention also contemplates the manufacture of ring molds by this method in view of the fact that the metal adjacent the edge of the mold is compressed and consequently is harder than the adjacent metal, thereby being of greater wearing qualities and being better able to withstand the higher temperature due to the hot plastic glass. The present invention, therefore, comprises both an article of manufacture and a method for producing the saine.

Referring more particularly to the drawings andk to the Figures l and 2, the block mold l is provided at its upper edge with a recess in which the ring mold 2 is adapted to set. When the plunger 4t enters the block mold 1 having a suitable charge of glass therein.r the glass article, which may comprise a tumbler 5, is pressed between the block mold, t-he ring mold, and the plunger. It is obvious that the glass is displaced upwardly around the plunger 4 as the plunger descends into the mold and that in view of the plastic cndition of the melted glass it attempts to escape between the plunger and the ring mold. This tendency places extra heavy duty upon the small corner or edge of the rino' mold.

Referring more specially to Figure 2, which illustrates a section of the ring mold in accordance with the present invention. it is to he noted that the edge 3 adjacent the recess (l is illustrated as being formed of hardened or compacted metal. This greatly assists in the prolongation of the life of this edge.

Referring now to Figure 3, which illustrates an exeeedingl y worn ring mold, and in this illustration it is to be noted that the sur face T, which is adjacent the plunger, has become worn away to the position of T, and that the edge is worn away and assumes the position as shown at 8, whereas the normal edge is shown in dotted lines as at The worn ring 2 is adapted to be mounted in a chuck 9, (Fig. G), and is subjected to the action of the spinning tool which comprises a body lO that carries a spinning head ll upon a suitable post l2. This spinning tool is mounted on a suitable machine tool, (not shown), and is urged under pressure in the direction of the arrow A. This compresses and displaces the metal adjacent the recess (l in such manner that the metal displaced inwardly and assumes the position 7b, as illustrated in Figure 4, and wherein the normal position desired is indicated in dotted lines as at 7. r he spinning tool is then removed and the excess of metal as at 7b is removed either by cutting away the metal with a suitable lathe tool, or by any other well known metal shaping operation, until the inner surface has assumed the c iflindrical form desired and indicated by the position 7. The worn ring is again ready for use and is equally as good as a new ring.

It is to be understood that the presentmethod is also applicable to the manufacture of rings in the iirst instance, and that it produces a ring wherein the metal in the edge 5 is compacted upon itself. as is illustrated in Figures 2, 4f, and 5, so that the edge is better enabled to withstand the heavy duty that is imposed upon this small portion of metal.

This application is a division of my prior application filed January 6th, 1920, Serial llumber 349,704.

Having thus described my invention. what I claim is:

l. The method of manufacturing molds for pressed glassware which comprises producing a matrix of approximately the desired shape, then subjecting1r portions of the mold to con'ipression forces to compact and harden the said portions. then finishing the hardened portions to the desired size and shape.

2. The method of manufacturing ring molds for pressed glassware which comprises producing a ring matrix of approximately the shape desired, then subjecting edge por tions oit the ring mold to compression iliorces to compact and harden the said edge portions, then. finishing the hardened portions to the desired size and shape.

3. The method oii manufacturing molds tor pressed glassware andthe like Which molds have projections `adapted to sustain pressure and adapted to shape a part oit the finished article, which method comprises subjecting the metal at and adjacent to the projections to forces to. compact and to harden the metal in the said projections, and then shaping the compacting metal.

l. ".llhe` method. ot mamitacturing ringl `molds ior pressed glassware and the like Vwhich method comprises subjecting the inner edge oit the ringl mold to compression iorces to compact and harden the said edge, and then finishing the edge to the desired din'iension and form.

5. rlhe method ot manuiiacturing ring molds :tor pressed glassware and the hlre which method comprises lispla-cing metal trom the matrix portion toward the inner edge ot the ring mold to provide an eitcess ot nietal at the said edge, and then cutting away the excess oit instal at the effige to olotain the desired dimension and itorm.

(i. rllhe method ot manufacturing ring molds tor pressed glassware and the like which method comprises toi-ming the ring mold to suhstantialljy the shape and dimension desired then spinning the metal adjacent the inner edge ot the ring radially in wardly, and then 4finishing said edge to the desired shape and dimension. p

7. rllhe niethod oft inanutacturing ring molds for pressed glassware and the like which method comprises 'forming the ring mold to substantially the shape and dimension desired, then spinning the metal from the bottoni oit the matrix groove adjacentthe :inner edge oi' the ring radially inwardly, and then iinishing said edge to the desired shape `and dimension.

ii. The method ot repairing worn ring molds which method comprises displacing metal trom the body portion o;lJ the ring toward the inner edge and in excess ot the amount ot metal required tor an inner edge, then relinishing an inner edge of the desired shape and dimension troni the said excess oi dispiaced metal.

The method oi repairing Worn ring molds which method comprises renewing the matrix groove hy displacing` metal :trom the bod),T` portion ot the ring toward the inner edge and in excess of the amount o'l metal required i'or an inner edge, and reiinishing the inner edge to provide the desired shape and dimension trom said excess of displaced metal.

PlBl'ltltllit lltliltlllltl. 

